Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Summary of Future Minimum Lease Payments under Capital Leases (Detail)

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Commitments and Contingencies - Summary of Future Minimum Lease Payments under Capital Leases (Detail)
$ in Thousands
Dec. 31, 2017
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2018 $ 157
2019 68
2020 45
2021 28
2022 1
Total $ 299